Lamp support arm



FIG. 1 is a left side elevational view of the lamp support arm inaccordance with the design, illustrated in an environment of a lamp;

FIG. 2 is a top plan view of the lamp support arm in accordance with thedesign;

FIG. 3 is a rear side elevational view of the lamp support arm inaccordance with the design;

FIG. 4 is a right side elecational view of the lamp support arm inaccordance with the design, the left side being a mirror image thereof;

FIG. 5 is a front side elevational view of the lamp support arm inaccordance with the design; and,

FIG. 6 is a bottom plan view of the lamp support arm in accordance withthe design.

The broken lines show the environment in which the article is used andare not considered part of the design claimed.

The ornamental design for a lamp support arm, as shown and described.